Multicylinder pump



Jan. 8, 1929. 1,697,853

w. L. ICQURSEN MULT I CYLI NDER PUMP Original Filed Feb. 11, 1927 2 Sheets-Sheet l J" .1 I J7 W. L. COURSEN MULTICYLINDER PUMP Jan. 8, 1929. 1,697,853

Original Filed Feb. 11, 1927 2 Sheets-Sheet 2 Patented an. 8, me.

WALTER L. COURSEN, OF'NEW ROCHELLE, NEW YORK, ASSIGNOR T TUBIZE ARTI- FICIAL SILK COMPANY AMERICA, A CORPORATION OF DELAWARE.

,MULTIGYLINDER PUMP.

Application filed February 11, 1927, Serial No. 167,436. Renewed June 16, 1928.

My invention relates to multicylinder pumps and has for its object to provide a pump especially well adapted for handling the viscous fluids used in the manufacture of artificial silk filaments, such fluids for instance, as viscose or nitrocellulose collodion, in which mode of use the pumps may be said to act rather as regulators, providing for a constant rate of flow of the fluid through the spinnerettes than to perform the Ordinary function of pumps. While my improved pump is es-' pecially adapted" for the purposes above noted, it is also usable for the ordinary purposes of pumps in general.

The special object of my invention is toprovide a pump of such character that the moving parts will be thoroughly lubricated by the fluid'passing through the pump and also of such a construction that the danger of escape of fluid by leakage is minimized and the pressures within the pump balanced as nearly as possible. c

The nature of my improvements will be best understood as described in connection with the drawings which illustrate my invention as applied in what I believe to be its bes and most eflicient form and in which Figure 1 is a plan view of my pump shown partly in section on the line 1-1 of Fig. 4.

Figure 2 is a central sectional elevation of the pump shown in Fig. 1.

Figure 3 across section on the line 33 of Fig. 2 and Fig. 4 a cross'section on the lined-f Fig. 2. i I

A is a fixed body in which, as shown, I form a hearing A for the end of the actuating shaft and a series of cylinders A extending A through the body A from end to'end. A and A are passages formed in the body A and communicating respectively with the opposite ends thereof. A is an inlet passage formed inthe body A, communicating, as shown,.with the bearing A and with a pas sage a connecting with one end of the body A, as shown. A passage A leading from the other end of the body A communicates with the outlet port A". :B, B, etc., are cylindrical bushings fitting in the cylinders A and having bores B and B of different diameters communicating respectively with theend chambers of the pump. The bores B constitute the pump cylinders proper and are provided with ports B and B diametrically opposite to each other and communicating respectively with the passages A and A 0, C are differential pistons working in the cylin ders B B and having extensions C from the working face of the larger piston section, which, as the pistons revolve, alternately open and close the ports B and B The ends of differential pistons extend into the end chambers of the pump and are formed with hemispherical terminal ends C, C, for apurpose which will be explained, and to one end of the pistons are secured the gear Wheels D, D.

End chambers, indicated at E and F are formed on each side of the fixed body A by means of caps E and F, the cap E being formed with an externally threaded stuifing box E into which extends a gland E held in place and adjusted by means of the nut E. The ca F is shown as formed with a threaded per oration F through which extends a screw J supporting a hemispherica-l'pivot, indicated at J v G is a rotating shaft extending through the stuifing box into the" chamber E and having, as shown, a reduced end G supported in the bearing A I is a cam secured on the shaft G by key 9 and located in the chamber E and H a gear wheel secured on the shaft and engaged with the gears D secured to the piston ends. K is a wabble plate centrally pivber F L, L, etc., are slippers or shoes rest- I ing in contact with the cam H and the wabble plate K and having spherical depressions in which fit the spherical ends 0, c of the piston ends. 0 and e are grooves'for fluid in chamber E and e a screw plug closing a port opening into groove 6 It will be seen that when the shaft G is rotated the rotating cam I and rotating. gear wheel H will impart a reciprocating androtating movement to the pistons, vwhich are held in operative contact with the cam by the --wabble plate K. During the suction stroke of the pistons the cylinder B is, by the extension of the piston portion C, placed in communication with the port B passage A and chamber E and during the compression stroke the cylinder is "placed in communication with the port B passage A" and chamber F It will also be seen that the mechanisin located in the chambers E and F is lubricated by the flowing mass of fluid pass ing through the'pum'p, which also acts as a lubricant to the ends, of the diflerential pistons. It will also be seen that the end thrust on the pistons "is only that due to the difference in the pressure existing in the chambersE and F Where the effective pressure exerted on the I ends of the pistons extending into the cham- I claim as new and desire to secure by Let-- ters Patent is: y a

1. A multicylinder pump comprising a fixed body having formed in it a series of cylinders each having diametrically opposed inlet and outlet-ports, passages connecting one setof said ports with a gear containing chamber into which the cylinders open at their ends and passages connectingthe other set of which ports to a common exit conduit, in combination with a gear containing chamber at one end of the cylinder carrying body, a series of pistons working in the cylinders and extending into the chamber, said pistons having extensions from their working ends which open and close the cylinder ports as the pistons rotate, and gear wheels secured to their ends which extend' into the end chambers, a rotating shaft entering the gear chamber having secured to it a cam for giving reciprocating mot-ion to the pistons and a gear wheel engaged with the gears on the piston ends for rotating the pistons, a conduit for fluid opening into the gear chamber and means for holding the pistons in operative relation to the cam.

2. A multicylinder pump comprising a fixed body having formed in it a series of cylinders each having diametrically opposed inlet and outlet ports communicating respectively with end chambers at each end of thecylinder containing body in combination with said chambers connected with the inlet and outlet ports, rotating and reciprocating pisclose the cylinder ports as they revolve, means for reciprocating and revolving the pistons located in the end chambers and lubricated by the fluid passing through the pump and.

supply and exitpassages connected respectively to the end chambers.

3. A multicylinder pump comprising a fixed body having formed in it a series of cylinto the end chambers and which are formed to open and close the cylinder ports as they revolve, gear wheels'secured to the piston ends which extend into one of the end chambers, a rotating shaft entering said end chamber having secured to it a cam for reciprocating the pistons and a gear wheel which engages and rotates the gears secured to the piston ends and a pivoted wabble plate located in the opposite end chamber and contacting with the piston ends extending into said chamber to hold them in contact with the cam.

4. A multicylinder pump comprising a fixed body having formed in it a series of cylinders each having diametrically opposed inlet and outlet ports;communicating respectively with end chambers at each end of the cylinder containing body, in combination with said chambers connected with inlet and outlet ports, rotating and reciprocating pistons the ends of which extend into the end chambers and which are formed to open and close the cylinder ports as they revolve, 1

gear wheels secured to the piston ends which extend into one of the end chambers, a rotating shaft entering said end chamber having secured to it a cam for reciprocating the pistons and a gear wheel which engages and rotates the gears secured to the piston ends, an adjustable pivot and a pivoted wabble plate located in the opposite end chamber and contactin with-the piston ends-extending into said 0 amber to hold them in contact with the cam.

WALTER L. COURSEN. 

